He didn't purchase FSD Beta, because it isn't for sale. Current FSD is for sale, and you will receive FSD Beta update when it gets out of beta. The only way to currently get FSD Beta is get selected (after applying) into the beta tester group for it.

If you want to record videos or reviews of yourself driving current FSD (that's for sale), you are more than welcome to, no one will stop you, and you aren't breaking any rules. FSD Beta is literally a beta tester program. And selective small-audience beta tests for all kinds of products typically carry extra restrictions in terms of what you can publicly reveal as a participant.

And subject to selective enforcement. Because I sure don't see each and every FSD beta video getting pulled.

Tesla doesn't have a full self-driving product to sell. Tesla's been lying about it for nine years now:

https://www.tesla.com/blog/all-tesla-cars-being-produced-now...

https://jalopnik.com/elon-musk-promises-full-self-driving-ne...

Bernal demonstrated the product he purchased.